Just as a solution to htc if they read this..
.the bug might be related to the invisable pt boat at 600m to 1.5 k as well, i think there is a graphic or image collision between the tanks and the ground and hanger, the water and the pt boat's, i also notices I see a few hurri in the vh at a few vh bases (u know which ones) that will start rolling before we have a image on them to yea VULCH!..i do believe it is a image collision problem of some sort!